Yeah I know programming as well as Javascript as well...But Extjs seems to be little bit different from normal javascirpt. So please guide me to move forward with Extjs...Thanks in advance!

Hi Andy,

Sencha's Guide is best place to start with. There you would get the basic idea and understanding of classes and how to start your coding stuff. It would be difficult to follow at first but don't giveup. In matter of hours you will get used to it and understand things.